Is that how you actually type, or are you speculating? With regular home row typing, e-x-a is 3-4-5, which are the hardest fingers to "drum", and even harder on three different rows. I've tried micro-optimizing special cases like this before, but then I have to think as much about typing as what I'm typing. On the other hand, I know I've hit "sl" by mistake more than a few times.
> e-x-a is 3-4-5, which are the hardest fingers to "drum", and even harder on three different rows.
Its because of the rules of blind typeing courses that says thumb should be used only for space? If you got such a courses more than a year before and already mastered blind typeing, than stop worrying. Just use thumb for `x`.
> I've tried micro-optimizing special cases like this before, but then I have to think as much about typing as what I'm typing.
It got better with practice. Like blind typeing. All you need is to train you fingers for they do it without conscious effort of thinking. Are you play on some musical instrument? Try it, it teaches how to train your fingers.
My fingers are pretty well trained for typing - around 100 WPM, 120 on a good day. As I say, I've tried tweaking my technique for special cases, but it just makes typing more laborious for little or no gain.
It could be different for others. I saw a guy who could do 100 WPM with literally two fingers, although it looked exhausting. A year of waking up with my fingers locked, simultaneously numb and throbbing in pain, taught me that maintaining a relaxed flow is more important than those last 10 WPM. But that means a few combinations like e-x-a will be tap-tap-tap instead of t-t-tap.
